Loudspeaker



FIG. 1 is a perspective view of the loudspeaker of the claimed design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a bottom perspective view thereof;

FIG. 4 is a rear perspective view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a top view thereof.

The ornamental design for a loudspeaker, as shown and described.